Logic or logic circuits are electronic circuits that need two or more input signals to complete a logical operation. In essence, their output is dependent upon their input – and they will not be able to operate on their own on facts; they have to be told what these are. A common example of providing facts to logic circuits is when opening and closing a switch. Whether the switch is opened or closed – or turned on or off, it tells the circuit what the state of the door is.
Logic circuits are also described as gates or switching circuits that are utilized in digital computers and similar devices. They are also used in telephone exchanges, calculators, and all other applications that have two-state systems.
These electronic circuits behave like programming language methods or functions. The only obvious difference is that logic circuits produce multiple outputs.
Logic circuitry is categorized into two: state circuitry and combinational circuitry.
Logic Circuitry Types
State circuitry has memory that is embedded in its circuitry, which is why its output is based not only on the input but also on historical inputs. It performs or works like an object method, with values that are dependent on instance variables or on the state of the object.
It can recall program counters, registers, memory, and other similarly essential information.
A state circuitry’s basic element is a flip flop, which keeps one bit of data that can be incorporated into multiple flip flops thus creating a register or a multi-bit state element.
Combinational circuitry is logic circuitry that performs like a simple function. It bases its output on the input’s present values. Theoretically, this circuitry depends on logic gates – inverters, OR gates, XOR gates, and AND gates.
Basic Logic Circuits
The three basic logic circuits are AND, NOT, and OR. When they are combined, they form a new circuit, like NAND (a combination of NOT and AND circuits).